After an ancient Greek island re-appears in the Earth dimension after 1,000 years, Capt. Majors is hypnotically induced to bring the Calico there by a mysteriously beautiful singing. Upon arriving, the crew discover that the island is the home of the Sirens, three deadly sisters from Greek mythology who entrance male sailors with their hypnotic singing, luring them to the island where they meet their doom. Although the leader of the Sirens, Morphea, initially seems to welcome the crew, they soon learn that they are to be kept on the island after it disappears at sunset by being turned to stone (an idea the Sirens possibly stole from another trio of deadly sisters from Greek mythology, the Gorgons). After the crew open the doors to a chamber against the warnings of Morphea, they release a Chimera, a gigantic fire-breathing mythological monster that is a three-way cross between a lion, a goat, and a serpent. After Morphea exclaims that not even the Sirens can control the Chimera, the
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